Evviva Sciences Potato Dextrose Agar Petri Dishes - Prepoured Potato Dextrose Agar (PDA) - for Mushrooms, Home Test Kit, or for Science Fair Projects, Petri Dishes with Agar

These came in sealed bags- 2 sealed dishes, then 3 sealed dishes on one bag as others stated. My order was for 10. They have a little moisture but not dripping wet like some have reported. No contamination after leaving them in room temperature for three weeks. Used two already with perfect results. Time to use the rest up or risk degradation. As with all these agar filled dishes, I wouldn't refrigerate as that will condense liquid and make a mess. We always refrigerate, but in this case it's a moot point considering the shipping company has them in their truck for hwo knows how long on adverse conditions. My only disappointment is that these should be individually sealed, or at least sealed in pairs seeing it's a "lot of 10". Once opened in front of a laminar flow or clean still air box, using them is really your only option or one runs the risk of contamination. I'm about to order a second batch hoping for similar results. So far, I would recommend these under the conditions stated above.

We originally ordered agar petri dishes from another company but *many* of those dishes arrived wet and already growing bacteria/mold. We needed another set of agar petri dishes quickly for a science project and these arrived on time with all dishes usable and intact! There was a note included with the product that sometimes dishes get damaged in transit, with a number to call if necessary to arrange for replacement but we didn't need to use it. The quality of these dishes was so much better than the others we ordered! Also appreciate that the company proactively included information for customer service just in case.

I used these to test a few rooms in my house for airborne mold. Leave them open in a room for an hour, incubate them for a couple of days, then shine a light through them and count the number of mold colonies that have formed. I was able to rule out any serious mold problem in my home because almost no mold colonies formed on any of the plates. These were fast and cost-effective compared to "test kits" for home airborne mold spores.

Contaminated, waste of money.

Received all 10 sterile plates in 2 packs of 5 which is very helpful since I won't have to risk contamination by opening the entire set at once. No early signs of contamination or other issues. I'll update this review after I've had a chance to use them further.

Cultured very easily! No contamination on any plates!!

Came fast,good shipping,they seem as advertised. One dish did come with contamination,along with one separate disk cracked across the agar side. Not contaminated shockingly. I'm thinking its probably a fluke thing with contamination. Probably shipping for the crack. Bad time of year to order,plus cv19. Hopefully no others arent sterile. They should be showing by now if they weren't. Will update when I hear from support about what they are going to do. Minus the issue they seem ok. Update: Spoke with customer service. Very fast response and kind people. Free new 5 pack on its way.

I did end up with one with cracked plastic. Had to toss. Other than that these are beautiful. Stored at room temp for 3 weeks and showed no sign of contamination. Then used a few and grew perfectly clean cultures. Still have some in the fridge that look healthy and look forward to using them. I wasn’t even gonna write this but saw so many people complaining that I had to set it straight. These are clean, sterile dishes. There is no contamination. Any issues you have are probably from unsterile technique. Hell, my house is a mold factory but I still produced healthy cultures. Bottom line, these are safe to buy & use.

Worked great

As a newbie to mushroom growing I did not have much luck with these. I put in one cc of liquid culture of Oyster mushroom in 5 of them and they just went moldy for me. I had done 20 homemade agar plates on my own. Used 10 of them, to see the difference. I had 5 of them with the same process with liquid culture and got the same type of mold, but my other 5 home made plates with liquid culture were good. So will chalk it up to my inexperience and a good learning experience. Will try them again later.

6 out of 10 Petri dish of agar were contaminated.

Great for beginners getting into mycology. Clean plates!